Key Solar LLC

Key Solar LLC is a Massachusetts-based EPC contractor specializing in commercial and industrial photovoltaic installations across New England and the Mid-Atlantic regions. Established in 2016 and headquartered in Holliston, MA, Key Solar holds NABCEP certification—a mark of quality within the solar industry—and has built a reputation for delivering complex projects on time and within budget. The company leverages experienced structural/electrical engineers alongside seasoned designers to create tailored solutions that meet each client’s unique requirements.
Notable achievements include constructing large-scale arrays such as an 8-acre project with over 8,000 panels near Boston (2.7MW capacity) and another major array in Braintree (2.4MW). Their collaborative approach ensures comprehensive planning from initial design through final build-out—emphasizing reliability, efficiency, and value for developers as well as end customers.